Bart Willems wrote: > I can try this in interactive mode: > >>> a = 5 > >>> b = a > >>> a += 1 > >>> print b > 5 > > So, if /a/ and /b/ where pointing to the *same* "5" in memory,
They do: >>> a = 5 >>> b = a >>> a is b True >>> a += 1 >>> a is b False ... but not after a is rebound to a new int. > then I would expect b to be increased, just as a. But after > increasing a, b is still 5... int objects are immutable. Thus, when rebinding a (as happens here in "a += 1"), a new instance of int is created and "a" points to it. > By the way, a classic language like C has features like this too; > they're called pointers. C's int* behaves differently. Regards, Björn -- BOFH excuse #163: no "any" key on keyboard -- http://mail.python.org/mailman/listinfo/python-list
